(19)
(11) EP 4 481 851 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.01.2025 Bulletin 2025/05

(43) Date of publication A2:
25.12.2024 Bulletin 2024/52

(21) Application number: 24172933.4

(22) Date of filing: 29.04.2024
(51) International Patent Classification (IPC): 
H01M 4/38(2006.01)
H01M 4/525(2010.01)
H01M 4/62(2006.01)
H01M 10/0566(2010.01)
H01M 10/052(2010.01)
 H01M 4/505(2010.01)
H01M 4/58(2010.01)
H01M 10/0565(2010.01)
H01M 10/42(2006.01)
H01M 10/0525(2010.01)
(52) Cooperative Patent Classification (CPC):
H01M 10/0565; H01M 10/0525; H01M 2010/4292; H01M 10/0566; H01M 4/5815; H01M 4/625; H01M 4/525; H01M 4/505; H01M 10/052; H01M 4/382; H01M 4/62; Y02E 60/10
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 23.06.2023 KR 20230081164

(71) Applicant: Samsung SDI Co., Ltd.
Yongin-si, Gyeonggi-do 17084 (KR)

(72) Inventors:
  • Son, Inhyuk
    17084 Gyeonggi-do (KR)
  • Jo, Sungnim
    17084 Gyeonggi-do (KR)
  • Shim, Kyueun
    17084 Gyeonggi-do (KR)
  • Lim, Hyungsub
    17084 Gyeonggi-do (KR)
  • Park, Taehyun
    17084 Gyeonggi-do (KR)
  • Lee, Jieun
    17084 Gyeonggi-do (KR)

(74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB 
Kaistraße 16A
40221 Düsseldorf
40221 Düsseldorf (DE)

   


(54) SECONDARY BATTERY


(57) A secondary battery including a cathode layer, an anode layer, and a flexible electrolyte layer between the cathode layer and the anode layer. The cathode layer includes a cathode current collector and a cathode active material layer on at least one surface of the cathode current collector. The anode layer includes an anode current collector and a first anode active material layer on a surface of the anode layer. The initial charge capacity of the first anode active material layer is less than 50 % of the initial charge capacity of the cathode active material layer.







Search report









Search report